Elevator-head.



G. J. BICKHART.

ELEVATOR HEAD.

APPLICATION FILED MAY 24. 1916.

l j 96 1 Patented Apr. 10, 1917.

.Z'NVENTUR f FFI@.

GRABILL J. BICKI-IART, or HILBERT, WISCONSIN.

ELEVATOR-HEAD.

Specification of Letters Patent.

' Patented Apr. 10, 1917.

Application filed. May 24, 1916. Serial No. 99,575.

To all whom it may concern:

Be it known that I, GRABILL J. BICKHART, a citizen of the United States, residing at Hilbert, in the county of Calumet and Statefrom that of the mill building. As a consequence when, by reason of the unequal settling of the two structures, wear of the parts of the elevator or other causes, the mill building and the elevator assume different positions there is wear or undue friction between the parts of the hearings in the elevator head and th shaft. This friction results in considerable .loss of power, needless wear or injury of the parts, and frequently suflicient heat is generated by friction to cause fire.

The object of my invention is to provide a bearing which will obviate friction and wear between the shaft and the elevator heads, and whereby also the shaft shall be relieved of the weight of the bearings of the elevator shaft thus avoiding undue wear between the two parts.

With this object in view the invention consists of a bearing for the purpose described having the novel generic and specific features of construction and arrangement of the parts, substantially as hereinafter described and claimed. i

The invention is illustrated in the accompanying drawing in which,

Figure 1 is a side elevation showing a shaft having bearings in a mill building, and elevator heads arranged to receive the shaft;

Fig. 2 is a perspective view of one portion of a sectional elevator head having my improved bearings attached thereto;

Fig. 3 is a horizontal sectional view of an elevator head incorporating the bearing; and,

Fig. 4 is a perspective View of one section of the bearing employed, partly broken away, showing the means for attaching it to an upright of the elevator, and also showmg the means for relieving the shaft of the \veight of the bearing.

In the drawing 1 represent suitable uprights of a mill building to which are attached bearings 2 for a shaft 3. Arranged between the uprights 1 are elevator heads 4;

through which pass the elevators 5, the latter being supported upon suitable elevator construction not shown, independent of the mill. Th elevator heads are made in sections, suitably connected, and attached to the vertical uprights of each section of the elevator head at each side thereof are plates 6 which have formed or attached thereto pro-- jecting ribs 7 which in cross section are of dovetail form. Each section of the elevator heads is cut away at each side forming elongated vertical openings8 in the sides of the elevator head through which the shaft 3 extends, and the plates 6, which are of less length than the openings are in the present embodiment of the invention attached to the edges of the openings.

Arranged on each side .of each of the openings in the head is a sectional bearing consisting of a block 9 having in its inner face a semicircular opening for receiving the shaft,

On the outer face of each block 9 is secured a plate 10 having a longitudinal opening 11 therein, and projecting from each side of the plate over the opening are flanges 12 the inner faces of which are at an angle to the plate, to form a dovetail way of a form and size to receive one of the ribs 7 attached to a section of the elevator head.

When the bearing sections are arranged in place with the ribs 7 of the plates in the ways formed by the flanges, no lateral movement of the bearing sections is permitted, but free independent vertical movements of the elevator head and of the bearings is allowed.

'A spring 13 is attached to1 each bearing section, and such spring has an upturned end 14 extending through the opening 11 of the plate 10. This end bears upon a'dovetail rib -7 of one of the plates 6, when the parts are assembled, and the friction imposed by the spring is sufficient to prevent downward movement by reason of its own weight of the I bearing section to which it is attached. By this means friction between the parts and constant wear of the shaft when the elevator is in operation is avoided, but the shifting of the bearing in the event of the changing of the relative positions of the elevator and the mill building is permitted.

The spring 13 is preferably formed as herein shown with a broad shank 15, secured between the plate 10 and the face of the bearing section 9, and with a narrow bodycorresponding to the width of the opening 11 extending through such opening.

The vertical openings 8 in the sides of the head through which the shaft projects are of a width to receive the shaft and are'of a length to permit of the ordinary downward movement of the mill building or the elevator due to independent settling of either, without having the shaft come into contact with either end of such openings.

Attached to the outer faces of each elevator head section is a board 16 having an elongated opening 17, in its inner face for the passage of the shaft 3. The boards overlap the ends of the block 9, and the length of the openings corresponds to the length of movement permitted the blocks independently of the elevator head. Thus the openings in the sides of the elevator heads are closed at all times irrespeetive of the variations in the position of the journals.

I claim:

1. An elevator head having vertical openings in its sides,vertical dovetail ribs arranged adjacent to the vertical openings,

and bearing sections each having a dovetail way receivlng one of the ribs.

2. An elevator head having vertical openings in its sides, vertical dovetail ribs arranged adjacent to the vertical openings, bearing sections each having a dovetail way receiving one of the ribs, and springs extending into the ways and bearing on the ribs.

An elevator head having vertical openings in its sides, plates having vertical dovetail ribs arranged adjacent to the vertical openings, bearing sections having on their outer faces plates provided with dovetail ways adapted to receive the ribs, the plates attached to the bearing sections having openings therein, and springs extending through such openings and adapted to bear on the ribs.

4. An elevator head having vertical openings in its sides, plates having vertical dovetail ribs arranged on the edges of the vertical openings, bearing sections having plates attached to their outer faces, dovetail ways formed with the plates and adapted to receive the ribs, and boards having openings therein arranged on the outer faces of the elevator head and overlapping the ends of the bearing sections.

In testimony whereof I aflix my signature in the presence of two witnesses.

GRABILL J. BICKHART.

Witnesses:

THEO. H. RUNTE, EDWIN JANTZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 1). C 

